AAC Springfield is a high protein soybean [Glycine max (L.) Merr.] cultivar developed by the Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, Ottawa, Ontario. It is intended for production in 2400 to 2600 crop heat unit areas of Manitoba, Ontario, and Quebec. AAC Springfield has a unique combination of high protein, high 11S:7S ratio, and early maturity.

Crop yield simulation can facilitate understanding and support policy response to climate warming. DSSAT modelling is dependable when the crop varieties characterised can manifest realistic yield-responses to weather and hence climate, in a location of interest. We strived to minimise field trial and cultivar calibration resources. Our primary objective was to identify in-built DSSAT cultivars, which when used with representations of local soils can simulate the observed maize and soybean yields of 1987–2016, across 12 counties in Southwestern Ontario. These cultivars/soils were then utilised to disaggregate historic weather contribution to trending yields, but they can otherwise serve climate projection impact studies, as envisioned. Technology had contributed to progressive time-based increases in measured yields. Hence, a mixed nRMSE and r² factor (MSF ≤ 1) enabled quick and decisive cultivar/soil selections, conditioned on closer matching simulated yield levels and variations with measured. Pio-3563 (maize) and Pio-9202 (soybean) were among the cultivars selected. Northern and southern subregional composites of simulated county yields, from final selections, compared with measured at nRMSE ≤ 0.20 and r² ≥ 0.53, the best values being nRMSE ≈ 0.08 with r² ≈ 0.80 (soybean) in the south. Modelling indicated 60% and 52% climate warming contributions to increased maize and soybean yields, respectively, across Southwestern Ontario. These percentages mostly agreed with those of other investigators using statistical methods for weather impact evaluations, which were utilised for final validation of our selections. An additional finding was that northern weather contributed 35%, while southern weather contributed 70% to increased subregional soybean yields.

AAC Walker (BW1116) is a hollow-stemmed, awned, and high yielding Canada Western Red Spring (CWRS) wheat cultivar suited to the growing conditions of western Canada. AAC Walker was 7% higher yielding than AAC Brandon and 5% higher yielding than AAC Viewfield in the Central Bread Wheat Cooperative (CBWC) registration trials (2020–2022). AAC Walker had maturity, height, and lodging similar to Carberry. It was 11 cm shorter than Unity. The test weight of AAC Walker was similar to AAC Brandon and 1000-kernel weight similar to AAC Viewfield. The grain protein content of AAC Walker was 0.6 units lower than AAC Brandon. AAC Walker expressed moderately resistant reaction to Fusarium head blight (Fusarium spp.) and common bunt (Tilletia caries (DC) Tul. & C. Tul.). AAC Walker was resistant to prevalent races of leaf rust (Puccinia triticina Erikss.), stem rust (Puccinia graminis Pers. f. sp. tritici Eriks. & E. Henn), and stripe rust (Puccinia striiformis Westend) prevalent in western Canada. AAC Walker was resistant to orange wheat blossom midge (Sitodiplosis mosellana Géhin). AAC Walker was deemed to fit the CWRS wheat class by the Canadian Grain Commission (CGC) and registered with Canadian Food Inspection Agency (CFIA).